Computer plotting of multisystem p-T, T-X, p-X phase diagrams

As a continuation to the work reported by Yin in 1992, a new procedure is presented for computer plotting of the stable equilibrium phase diagram of an n-component system composed of (n + k) stoichiometric phases (or fluid species) where 2≤k≤4. The main points of the procedure are: (i) using the technique of sequential-absence of phases (SAP) to determine the possible invariant and univariant assemblages in a given multisystem; (ii) using the matrix inverse technique to generate and balance the univariant reactions from the corresponding univariant assemblages; (iii) comparing the phase assemblage at each invariant point with that of each univariant reaction to select the univariant curves about the corresponding invariant point; (iv) locating the invariant points with the technique of finding common equilibrium relation (CER); (v) using the sign function matrix (SFM) technique to discriminate between the stable portion of a univariant curve and its metastable extension about the corresponding invaria     

多体系p-T-X相图的计算机成图

继文献[1]工作,发展了一套关于多体系稳定平衡p-T-X相图的计算机成图新方法.其主要内容包括:相依序缺失法确定所有可能存在的无变度和单变度平衡相组合;矩阵反演法产生并配平所有的化学反应式;相比较法确定各单变度相组合与无变度相组合间的关系;公共平衡关系法求各无变度点的坐标位置;SFM法确定各单变度曲线在其相应无变度点两侧的相对稳定性;相比较法确定无变度点间的公有反应曲线;SFM法判别稳定和介稳定无变度点.     

利用强夯模拟试验研究饱和砂土强夯动本构关系

饱和土是孔隙中充满水的松散介质, 在强夯冲击荷载作用下的变形是非线性变形, 因此, 饱和土强夯动本构关系有其特殊性。本文利用具有 90年代先进水平高精度、高灵敏度的MTS810土动三轴仪对强夯加固饱和土地基进行了全面、系统的模拟试验, 试验按模型比设计, 试验条件与实际土体工况符合, 通过多组不同条件的组合试验, 获得了大量强夯数据, 在此基础上结合强夯现场试验对强夯过程中各种变量的变化过程及其相互关系进行了分析研究, 推导出强夯冲击荷载作下饱和土的动本构关系, 对强夯作用下土体动本构关系问题作出了有益的探索。